Horizontal boring, drilling and milling machine



June 30, 1964 H. N. STEPHAN HORIZONTAL BORING, DRILLING AND MILLING MACHINE 8 Sheets-Sheet 1 Original Filed March 12, 1954 June 30, 1964 PH 3,139,000

HORIZONTAL BORING, DRILLING AND MILLING MACHINE Original Filed March 12, 1954 8 Sheets-Sheet 2 INVENTOR. H44 4. /5 N SrEPHA/v June 30, 1964 STEPHAN 3,139,000

DRILLING AND MILLING MACHINE HORIZONTAL BORING 8 Sheets-$heet 3 Original Filed March 12, 1954 INVENTOR.

BY HALL/5 N rap/4,4 WW

June 30, 1964 H. N. STEPHAN HORIZONTAL BORING, DRILLING AND MILLING MACHINE 8 Sheets-Sheet 4 Original Filed March 12, 1954 VII/ll/ll/llllll/l/l 2. lllll III] 1 Fans June 30, 1964 H. N. STEPHAN 3,139,000

HORIZONTAL BORING, DRILLING AND MILLING MACHINE 8 Sheets-Sh 5 Original Filed March 12, 1954 \s Q g INVENTOR. HAM 1s A'- 375mm m -meme" y June 30, 1964 STEPHAN 3,139,000

HORIZONTAL BORING, DRILLING AND MILLING MACHINE Original Filed March 12, 1954 8 Sheets-Sheet 6 June 30, 1964 H. N. STEPHAN 3,139,000

HORIZONTAL BORING, DRILLING AND MILLING MACHINE Original Filed March 12, 1954 8 Sheets-Sheet 7 [N VEN TOR. HA4 1 IS A'- STEP M Arroezws/S U i ed States P t n 3,139,000 HORIZONTAL BORING, DRILLING AND MILLING MACHINE Hallis N. Stephan, Shaker Heights, Ohio, assignor to The New Britain Machine Company, New Britain, Conn, a I corporation of Connecticut Continuation of abandoned application Ser. No. 772,494, Nov. 7, 1959, which is a continuation of abandoned application Ser. No. 415,870, Mar. 12, 1954. This application June 12, 1962, Ser. No. 205,479

18 Claims. (Cl. 90-14) The present invention relates to apparatus, the operation of all or part of which is power actuated under the manual control and visual supervision of the operator, such as, a manually operated power driven machine tool and to devices for performing or controlling power actu ated visually supervised operations. This application is a continuation of my copending' application, Serial No. 772,494, filed November 7, 1959, now abandoned, which was a continuation of application, Serial No. 415,870, filed March 12, 1954, now abandoned. The disclosures of said application including the specification and drawings are incorporated herein by reference.

The principal object of the present invention is the provision of a novel and improved power actuated manually operated machine tool, or the like, comprising a device, the operation of which is under the visual supervision of the operator, having a small compact control station and being otherwise so constructed and arranged as to permit simplification of the control used in controlling the operations of the machine.

Another object of the present invention is the provision of a novel and improved manually operated machine tool, or the like, having movable machine elements, controllable power actuated means for moving the elements individually, and a control station including individual manually operable control or means, preferably electric switch means, for controlling a plurality of movements of each of a plurality of the various machine elements under the visual supervision of the operator, and wherein the individual control units or means are such that a single actuating lever controls a plurality of movements of an individual element.

Another object of the present invention is the provision of a novel and improved combined horizontal'boring, drilling and milling machine, having a plurality of movable machine tool elements, electrically controllable power actuated means for moving the elements selectively, and a control station for controlling the electrically controllable means including discrete manually operable switch units for each of a plurality of the machine tool elements, each switch unit comprising a switch actuating lever normally urged to a central position and movable to positions on either side of the central position, a first pair of electrical contacts operated when the lever is moved in one direction from its central position to cause the movement of the element controlled by the switch in one direction, a second pair of electrical contacts actuated by the movement of the lever to a position in the other direction from its central position to cause movement of the element controlled by the switch in the other direction, and means associated with the lever to enable the lever to be latched by the operator in a position on either side of its central position.

Another object of the present invention is the provision of a novel and improved compact pendant control station for a machine having a manually controlled power actuated member operated under the visual supervision of an operator, which control station has control means, preferably an electric switch, comparing a movable actuating Patented June 30,, 1964 tion about an axis parallel with the plane when in the,

' second position to selectively latch and unlatch the memher in the second position and a control instrumentality, preferably an electric switch, operatively associated therewith in such a manner that it is in inoperative condition when the member is in the first position and in operative condition when the member is in the second position.

A still further object of the invention is the provision of a new and novel manual-operated control means, preferably an electric switch means, for operating a power actuated device under the visual supervision of the operator, comprising a manually movable member supported for manual movement in a plane from a first position to which it is biased to a second position at one side of the first and for oscillation about an axis parallel with the plane when in the second position to selectively latch and unlatch the member in the second position and a control instrumentally, preferably an electric switch, operatively associated therewith in such a manner that it is in inoperative position when the member is in the first position and in operative position when the member is in thesecond position.

The invention resides in certain constructions and combinations and arrangements of parts and further objects and advantages thereof will be apparent to those skilled in the art to which the invention relates from the following description of the preferred embodiment described with reference to the accompanying drawings forming a part of this specification, in which similar reference characters designate corresponding parts, and in which,

FIG. 1 is a perspective view of a combined horizontal boring, drilling and milling machine embodying the present invention. 7

FIG. 2 is a diagrammaticview of that portion of the drive for the tool spindle which is located in the base of the machine;

FIG. 3 is a diagrammatic view of the portion of the drive for the tool spindle which is located in the spindle head;

FIG. 4 is a diagrammatic view showing the drive for reciprocating the saddle, table and spindle head;

FIG. 5 is an enlarged perspective view of the pendant control station;

FIG. 6 is a sectional view taken approximately along line 6-6 of FIG. 5 showing the switch structure used with a pendant control station;

FIG. 7 is a sectional view taken approximately along line 7--7 of FIG. 6;

FIG. 8 is a sectional view taken approximately along line 88 of FIG. 6;

FIG. 9 is an enlarged view of the cam shown in FIG. 8;

FIGS. 10 and 11 are circuit diagrams showing the control circuits'for controlling the movement of the various 7 machine tool elements of the machine.

The present invention is susceptible of various m0difications and of uses with various types of machine tools, etc., but it is particularly suitable for use with a machine or other device where it is necessary or desirable to perform a plurality of operations under the visual control or supervision of the operator, from a single control station, such as, a combined horizontal boring, drilling and milling machine wherein a plurality of movable machine tool elements are to be moved or otherwise operated from asingle station under visual supervision of the operator. The invention is herein shown as embodied in a combined horizontal boring, drilling and milling machine of the type illustrated in United States Patent No. 2,339,435.

Referring to the drawings, the machine shown therein comprises a base A, provided at one end with a spindle head column B formed with vertical ways and 11 upon which a spindle head C is mounted for vertical movement, and at the other end with a backrest or'outboard support column D slidably supported on horizontal ways 12 and 13 formed on the upper side of the bed. The ways 12 and 13 also support a saddle E having transverse horizontal ways 14 and 15 on the upper side which in turn support a work table F. The backrest column D is provided with vertical ways upon which a backrest block G is mounted for vertical movement.

The spindle head is adapted to be moved vertically along the ways 10 and 11 by a lead screw16 rotatably supported in the machine in a suitable manner and having threaded engagement with a nut fixed in the spindle head. In addition to being rotatable in opposite directions, the tool spindle 17 is movable in opposite directions longitudinally ofits axis of rotation at different speeds to effect both feed and rapid movements. The backrest block or outboard support G is movable simultaneously with thernovement of the spindle head C by a vertical lead screw 18 located within the backrest column D and connected to the drive for rotating the screw 16. The saddle E is movable longitudinally of the tool spindle along the ways 12 and 13 and the table F is movable transversely of the tool spindle along the ways 14 and 15 at different speeds by mechanism hereinafter specifically referred to.

The speed and direction of rotation of the spindle, etc., and the aforesaid movements of the various machine tool elements, such' as the feed and rapid movements of the spindle, head, saddle, table, etc., are performed by power and their operation may be controlled from any convenient place about the machine. The machine illustrated includes a reversible spindle drive motor 20 arranged for ceiling mounting and enclosed within the guard 21 adjacent to the left-hand end of the machine, a reversible feed motor 22 also located within the guard 21, and a reversible spindle rapid traverse motor 23 mounted on the spindle head C. Other motors are employed but their location and operation are not necessary to an understanding of the present invention.

The spindle drive motor 20 produces the spindle rotation and spindle feed movements. The feed motor 22 produces the feed and rapid movements of the spindle head C, saddle E and table F. The spindle rapid traverse motor 23 produces the rapid traverse movement of the spindle. The motors referred to are selectively connected to thevarious operating mechanisms through the medium of suitable speed change transmissions, clutches, etc., the controls for which are located on or adjacent to the base A ,of the machine, spindle head C, and pendant control station H fixed to the lower end of a tubular rod connected to a universally movable arm 24 by a flexible cable 25.

The spindle'17 is adapted to be rotated at various rates of speed by the spindle drive motor 20 through the medium of speed change gearing, designated generally by the reference character I, see FIG. 2, housed in a suitable gear box supported in the bed of the machine; a vertical shaft 28, the lower end of which is rotatably supported in the gear box While the upper end is supported in the head column B; and back gears, designated generally by the reference character K, located in the spindle head C. The motor 20 is connected to the driven shaft of the speed change transmission J by a V-belt drive and spur gears 31 and 32, the former 'of which is fixed to a shaft carrying the driven pulley of the V-belt drive while the,

4 latter is fixed to the shaft 30. The driving shaft 33 of the transmission J is connected to the lower end of the vertical shaft 28 by miter gears. The speed change transmission provides nine different speeds and comprises gear clusters 34 and 35 slidably 'supported on the shafts 3t) and 33, respectively and adapted to cooperate with gear clusters 36 and 37 fixed to an intermediate shaft 38. The gear clusters 34 and 35 are adapted to be shifted lengthwise of the shafts 30 and 33 upon which they are slidably splined to obtain the various speeds by any suitable mechanism. The particular mechanism employed forms no part of the present invention per se and is not illustrated and described herein in detail. I

The driven shaft 40 of the back gears, K is rotatably supported, in the spindle head and is connected to the upper end of the vertical shaft 28 by a bevel gear 41 carried by the spindle head and splined to the shaft 28. The bevel gear 41 meshes with a bevel gear 42 fixed to the left-hand end of the shaft 40. The spindle 17 is slidably keyed within a spindle quill 43 rotatably supported by suitable bearings in the spindle head C, which spindle quill has a gear cluster comprising gears 44 and 45 fixed thereto. The gears 44 and 45 are adapted to be selectively engaged by gears 46 and 47, respectively, of a gear cluster splined to the shaft 40. A high speed drive is obtainable through the medium of a V-belt final drive 48 when the gear 47 is shifted into engagement with a gear 50 fixed to a short shaft 51 journaled in the spindle head, which shaft carries the driving pulley of the V-belt drive 48. The gear cluster comprising the gears 46 and 47 is adapted to be shifted along the shaft 40 by a hand lever 52 fixed to the front end of a horizontal shaft journaled in the,

spindle head, the rear end of which shaft carries a yoke member, not shown, engageable with the gear cluster;

The spindle 17 is adapted to be fed or rapid traversed in either direction by a lead screw 53 rotatably supported in the spindle head extension and having threaded engagement with a two-piece nut 54 located within the feed slide 55 adjacent to the left-hand end of the spindle 17 and connected thereto in a suitable manner. The lead screw 53 is adapted to be rotated in either direction and at different speeds from the spindle quill 43 through the medium of spur gears 56 and 57, the former of which is fixed to the left-hand end of the spindle quill while the latter is fixed to the right-hand end of a shaft 58 journaled in the spindle head and which forms the driving shaft of a feed speed change transmission, designated generally by the reference character L, housed within a suitable gear box in the spindle head. A gear 60 which forms the driving element of the feed change transmission L is operatively connected to a horizontal shaft 61 journaled in the spindle head through the medium of a gear 62 fixed to the shaft 61 and forming the low speed element of an overrunning clutch transmission 59. The overrunning clutch per se forms no part of the present invention and may be similar to the clutch C described hereinafter. Suffice it to say that the shaft 61 is adapted to be rotated at a high rate of speed in either direction by the reversible rapid traverse motor 23, which motor is operatively connected to the high speed element 63 of the overrunning clutch transmission 59.

The shaft 61 is adapted to be operatively connected to a horizontal shaft 64 journaled in the spindle head and extending substantially the length thereof through the medium of gears 65 and 66 of a gear cluster fixed to the shaft 61. The gear 65 is in mesh with a gear 67 journaled on the shaft 64 and the gear 66 with a gear 68 which in turn meshes with a gear 69 also journaled on the shaft 64. The gear 68 is journaled on a jack shaft 70 and the gear 69 rotates in a direction of rotation opposite a provided with clutch teeth adapted to cooperate with similar clutch teeth formed on theadjacent sides of-the hub of the gears. The clutch element 71 is normally maintained in an intermediate or neutral position by a pair of springs 72 and 73 but is adapted to be shifted towards the left to drive the shaft 64 from the gear 67 or towards the right to connect the gear 69 with the shaft 64 by electric solenoids 74 and 75, respectively.

The armature of the solenoid 74 is connected to a slidable member 76 provided with an inclined cam slot 77 within which a roller carried by a longitudinally slidable rod 78 engages. The armature of the solenoid 75 is connected to the rod 78 in a manner similar to that in which the armature of the solenoid 74 is connected thereto, except for the fact that the cam slot 80 in the member 81 corresponding to the member 76 is inclined in the opposite direction to the slot 77. The lower ends of the cam slots are widened so that the operation of one of the members 76 and 81 will not be interfered with by the other. The slidable member 78 has a clutch yoke fixed to the right-hand end thereof which engages in a groove formed in the shiftable clutch member 71. The rod 78 is normally held in such a position that the clutch element 71 is in neutral position by the springs 72 and 73 which are located in a cut-out portion of the bar and engage opposite sides of a stationary stop fixed to the frame of the machine.

The left-hand end of the shaft 64 is connected to a gear'82 journaled thereon through the medium of an automatic release overload clutch 83. The gear 82 constitutes the driving gear of change gears, designated generally by the reference character M, the driven gear 84 of which is fixed to the end of the lead screw 53. Adjacent to its right-hand end, the shaft 64 is operatively connected to a spindle feed hand wheel 85, a crank 86 and fixed and adjustable dials, etc., as is known in the art- The mechanism shown per se forms no part of the present invention. I

The reversible feed motor 22 for moving the various machine tool elements is operatively connected to a horizontally extending shaft 100 rotatably supported in the base A, through the medium of a V-belt drive 101 and spur. gears 102 and 103. From the gear 103 the drive is either at a relatively slow or feeding rate through a variable feed change transmission, designated generally by the reference character N, and an overrunning clutch device, designated generally by the reference character 0, or at a relatively high or rapid rate through a normally disengaged disk clutch P, a shaft 104, and the overrunning clutch mechanism 0. The feed change gears, etc.,

are housed within a suitable gear box in the base A.

Through the medium of the transmission N, the shaft 100 may be rotated at various speeds, and through the medium of the normally disengaged friction clutch P, the driven element of which is carried by a gear 105 continuously in mesh with the gear 103, the shaft 100 may be selectively rotated at a high rate of speed. The gear 103 is keyed to the driven shaft of the feed change transmission N and the gear 105 is journaled on the shaft 104. The driving element of the friction clutch P is splined to the shaft 104, which shaft is in axial alignment with the shaft 100, and is adapted to be actuated to engage the clutch P upon energization of an electricallyoperated solenoid 106 connected to one lever of a bell crank lever 107 pivoted on the frame, the other lever of which is connected to a member 108 which in turn actuates the clutch elements.

The last, or driving gear 110 of the transmission N is continuously in mesh with a gear 111 which forms the low speed element of the overrunning clutch mechanism O. The gear 111 is rotatably supported on the shaft 100.and has formed integral therewith the driving element 112 of a normally engaged tooth clutch, the driven element 113 of which is splined on the shaft 100. The left-hand end of the driven element 113, as viewed in suitable nut fixed to the underside of the table.

FIG. 4, has aplurality of sloping teeth or cam surfaces 114 which cooperate with similar teeth 115 on a high speed driving member 116 fixed to the right-hand end of the high speed shaft 104. The member 113 is continuously urged towards the left, as viewed in FIG. 4, by a compression spring 117 interposed therebetween and the gear 111. The construction is such that the shaft is normally connected to the transmission N through the normally engaged clutch elements 112 and 113 and the gears and 111, with the'shaft 104 rotating at the same speed as the shaft 100 due to the engagement of the teeth 114 and 115.

Upon engagement of the friction clutch P, the shaft 104 is rotated at a higher rate of speed than the shaft 100. This difference in speed causes the teeth 114 of the slidable clutch element 113 to climb the teeth of the element 116 carried by the shaft 104, with the result that the slidable clutch element 113 is moved towards the right, disengaging the teeth thereof from the teeth of the clutch element 112, which in turn disen gages the low speed drive. Thereafter, the shaft 100 rotates at the same high speed as the shaft 104. Movement of the member 113 towards the right is limited by the compression spring 117, and the construction is such that the cooperating teeth 114 and 115 are never permittedto clear each other. Both-sides of the teeth 114 and 115 are inclined which makes the device operable for either direction of rotation of the motor 22. When the clutch P is released, the spring 117 reengages the cooperating clutch teeth of the clutch elements 112 and 113, and reconnects the feed to the shaft 100 in place of the rapid traverse.

The shaft 100 is also in axial alignment with a third shaft 118 to which it is connected by a normally engaged overload release clutch 119, operable in either direction. The right-hand end of the shaft 118, as viewed in FIG. 4, is provided with a gear 120 continuously in mesh with the gear 121 rotatably supported on a shaft 122 to which it is adapted to be selectively connected by a normally disengaged positive drive clutch Q, the driven element 123 of which is splined on the left-hand end of the shaft 122 and provided with clutch' gitudinally of the machine and rotatably supported in' the base A, which lead screw moves the saddle E along the ways 12 and 13.

The movable element 123 of the normally disengagegd clutch Q is adapted to be moved toward the right, as viewed in FIG. 4, to engage the clutch and thereby connect the lead screw 124 for moving the saddle E to the shaft 118 and in turn the feed and rapid traverse motor 22 by an electric solenoid 125 suitably supported in the base A of the machine, the armature of which solenoid is connected to the slidable clutch element 123 by a slidable rod 126 and a pivoted yoke member 127. The clutch is normally held in disengaged position by a compression spring 128 surrounding the rod 126 and interposed between the frame of the machine and a shoulder on the rod 126. A hand feed is provided for the saddle E in the form of a rotatable shaft 129, the front end of which projects to the front of the machine where it is arranged for the reception of a hand crank.

The table F is adapted to be moved along the ways 14' and 15 of the saddle E by a lead screw 130 rotatably supported in the saddle and operatively connected to a The lead screw 130 is adapted to be selectively connected to the shaft 118 in a manner similar to that in which the lead screw 124 is selectively connected to said shaft 118, which manner of connection has just been described. The gear 121 journaled on the shaft 122 is continuously in mesh with a gear 131 which in turn is continuously in mesh with a gear 132 journaled on a shaft 133 rotatably 7 supported in the base A and extending substantially the length thereof. 7 I

The gear 132is adapted to be selectively connected to the shaft 133 by a normally disengaged positive drive tooth clutch R similar to the clutch Q. The slidable element 134 of the clutch R is splined to the left-hand end of the shaft 133 and is moved towards the right to engage the teeth thereof with teeth formed on the hub of gear 132'by an electric solenoid 135, the armature of which is adapted to be connected to the movable clutch element 134 through the medium of a slidable rod 136 connected'to the armature and to one end of a pivoted lever 137, the opposite end of which lever is connected to a slidable rod 138 which in turn is connected to a pivoted lever 139 carried by a short shaft journaled in the frame, to the lower end of which shaft is secured a clutch operating yoke 140 that engages in a groove formed in the movable clutch member 134. The pivoted lever 139 is continuously urged in a clockwise direction,

v as viewed in FIG. 4, by a compression spring 141 interposed between the frame of the machine and a shoulder on the rod 136. The construction is such that upon energization of the solenoid 135 the armature is moved towards the left, rotating the member 139 in a counterclockwise direction and engaging the clutch R.

The shaft 133 is operatively connected to the lead screw 130 in the following manner: A gear 142 carried by the saddle E and splined to the shaft 133 is continuously in mesh with a gear 143 journaled on a shaft 144 and formed integral with a bevel gear 145. The bevel gear 145 meshes with a bevel gear 146 fixed to the rear end of a transverse shaft 147 rotatably supported in the saddle E, the forward end of which is connected to the lead screw 130 by change gears 148, 149 and 150, the first of which is keyed to the forward end of the shaft 147 and is continuously in mesh with the idler gear 149, which in turn meshes with the gear 150 keyed to the lead screw 130. The forward end of the lead screw is provided with a worm wheel 151 continuously in mesh with a .worm 152 fixed to a shaft 153 journaled in the saddle and extending longitudinally of the machine. The ends of the shaft 153 project from opposite sides of the saddle and are arranged for the reception of a hand crank. V

I The lead screw 16 which raises and lowers the spindle head and the lead screw 18 which raises and lowers the backrest block are adapted to be selectively connected to the shaft 118 in a manner similar to that in which the lead screws 1 24 and 130 are connected to the shaft 118. For this purpose, the gear 132 is continuously in mesh with a gear 154 journaled on a longitudinally extending shaft 155 to which it is adapted to be operative 1y connected by a normally disengaged tooth clutch S similar in construction to the clutches Q and R, previously referred to, the movable element 156 of which is splined to the shaft 155. The shaft 155 carries two bevel gears 157 and 158 continuously in mesh with bevel gears 159 and 160 fixed to the lower end of the lead screws 16 and 18, respectively. The gegar 158 is splined to the shaft 155 and moves therealong with movement of the outboard column D.

The movable element 156 of the clutch S is adapted to be shifted longitudinally of the shaft 155 to engage and disengage the clutch by apivoted clutch yoke member 161 formed integral with the clutch yoke member 140. The clutch yoke 161 is adapted to be rotated about its pivot in a clockwise direction to engage the clutch S by an electric solenoid 162, the armature of which is connected to the lower end of the pivoted lever 137 by a slidable rod 163. A compression spring 164 surrounding the rod 163 and interposed between the frame of the machine and a shoulder on the rod 163normally maintains the clutch S disengaged. The gear-159 fixed to the lower end of the lead screw 16 is also engaged by abevel gear 165 fixed to the rear end of a shaft 166 proe jecting to the front of the machine where it is arranged for the reception of the hand crank. This construction provides means for manually raising or lowering the spin-' dle head and the backrest block. The slidablemembers 126 and 138 are mechanically interlocked by a V -shaped member 167 pivotally supported intermediate its 'ends by the frame of the machine in such a manner that by moving one the other can be pulled into its'neutral position. The lower end of the member 167 is pivotally connected to the member 126 and a pin 168 carried by the member 133 projects between the upper ends thereof.

From the foregoing, it will be apparent that the saddle,

table, spindle head, and backrest block may be operated selectively either manually or by the reversible feed and rapid traverse motor 22. If operated by the motor 22, the movements may be in either direction and at either a feed rate or a rapid traverse rate.

After the desired spindle speeds and the. desired feed rates have been selected by manual operation of the speed change transmission J and the speed change trans-- missions L and N, the remaining operations of the machine are controlled from the control station H. The

control station H includes a spindle rotation control unit or assembly 169, a spindle jog and feed control unit or assembly'170, a spindle rapid traverse control unit or assembly 171, a spindle head feed and jog control unit or assembly 172, a saddle feed and jog control unit or assembly 173 and a table feed and jog control unit or assembly 174. These units are adapted to control the movement of the spindle 17, the spindle head C, the saddle E, and the table F and are arranged so that the movement of an operative member to the right or left energizes the various power actuators for the machine tool elements so that the element controlled by the respective control unit or assembly moves or rotates in the direction in which the operating lever is moved. The control station H also includes a rapid traverse control unit 175 for controlling the rapid traverse movement of the spindle head, saddle and table.

The control units or assemblies for controlling the movements of the various machine tool elements are constructed and arranged so as to permit simplification of the control for the machine so as to present a. compact control station, and, more particularly, so as to permit instantaneous control by the operator of the various movements of the different slides, etc. of the machine. The control units or assemblies, with the exception of the rapid traverse control 175, which, in the illustrated em bodiment is a simple push button switch, are similar in construction and only the spindle rotation control unit 169, illustrated in FIGS. 6 and 7 of the drawing, will be described in detail. As illustrated, the control unit 169 comprises a built-up or assembled framework located within the pendant control station housing and having a portion projecting outwardly through an aperture in a recessed Wall 178 of the pendant housing and which projecting portion is used to detachably fix the framework of the control unit to the pendant housing and provide a front bearing for a rotatable or rotor assembly 176 having a shaft 177 supported for limited rotation in either direction from a normal or first position to control the operation or position of control instrumentalities in the form of electric switches or contacts mounted alongside the rotor 176. The shaft 177 extends forwardly through the Wall 178 of the pendant control station H, the wall 178 supporting the unit 169 in the illustrated embodiment. The rotor isrotated either to the right or to the left from its normal position by a manual operating lever or crank 179 the upper end of which is supported in a diametrical slot 180 in the forwardly extending end of the shaft 177 of rotor 176 by a pin 181. The lever 179 normally extends at a right angle to the rotor 176 and is pivoted about the pivot pin 131 which secures the lever 179 in the slot 180. In the electric motor, as are the movements of the other ma-- chine tool elements or slides, therefore, the connections between the shaft 177 and the spindle drive motor 20 are generally speaking electrical and rotation of the rotor by swinging or pivoting thelever 179 about the axis of the rotor 176 controls-the rotation of the tool spindle 17 by closing either the normally open contacts 182, 183 or the normally open contacts 184, 185 mounted adjacent to but on opposite sides of the rotor 176. If the contacts 182, 183 are closed by moving the lever 179 to the left, as the control station H is viewed in FIG. 5, the tool spindle 17 will rotate to the left as the observer is facing the spindle. If the control lever 179 is moved to the right the contacts 184, 185 are closed, and the tool spindle will rotate to the right as viewed with the observer facing the tool spindle.

The contacts 182, 183 and 184, 185 are supported between spaced, parallel vertical walls 186, 187 of insulating material constituting a part of the framework of the control unit and extending substantially transversely to the rotor 176. The rotor 176 passes through central opene ings in the walls 186, 187.

The fixed contact 182 is supported on the vertical leg of an L-shaped conductive member 190 which has one leg supported generally horizontally between shoulders 191 on the walls 186, 187 near the upper edge thereof, and the other leg extending downwardly therefrom. The downwardly extending leg of the member 190 is provided with tabs 192 at its outer edges which are received in recesses in the walls 186, 187. Electrical connections are made to the contact 188 by a connecting screw 194 which threads into the horizontal leg of the member 190.

.The contact 183 is movably supported on the upper end of a generally vertical leaf spring 195 which urges the contact 183 away from contact 182 and is connected at its lower end to a conductive member 196 extending transversely between the lower portions of walls 186, 187 and having tabs 197, at its outer ends which are received in recesses in the walls 186, 187. The member 196 includes a conductive portion 198 extending outwardly of the member between the walls 186, 187 and having a connecting screw 199 threaded therethrough for providing an electrical terminal for the contact 183. The movement of the movable contact,183 and the control of the position thereof corresponding to the position of the rotor 176 is controlled by a cam 201 on the rotor. The cam 201 is adapted to engage a reverse bend in the leaf spring 195 which forms a cam follower surface 202. The cam 201 is so located on the rotor 176 that the cam follower surface 202 is just above the cam 201 when the lever 179 and the rotor 176 are in their normal position. The contacts 182, 183 will then be open since the spring 195 normally urges the contact 183 away from the contact 182. When the lever 179 is swung to the left, the cam follower 202 rides up on the face of cam 201 closing the contacts. If the lever 179 is swung to the right, the cam 201 is moved away from the cam follower surface 202 and, as a result, the contacts 182, 183 remain in their normally open position.

The contacts 184, 185 are supported in a manner similar to the contacts 182, 183 and a cam 203 on the rotor 176 for controlling the position of the contacts 184, 185 is normally located just below the follower on the finger supporting the movable contact so that the cam follower surface for operating the contacts is engaged and the contacts moved to their closed position when the lever 179 is moved to the right from its normal position but remain in their normally open position when the lever 179 is moved to the left from its normal position.

It is often desirable to provide normally closed contacts which are opened when the contacts 182, 183 are closed and contacts which are opened when the contacts 184, 185 are closed. In the control unit illustrated, two pairs of normally closed contacts 188, 189 and 205, 206- are located on opposite sides of the rotor 1-76 rearwardly of the normally open contacts 182, 183 and 184, 185, the contacts 188, 189 being on the left side of the rotor when the viewer is facing lever 179. The construction and mounting of the contacts 188, 189 and 205, 206 is similar to that for the contacts 182, 183 and 184, and will not be described in detail. Sufiice it to say that the rotor 176 is provided with cams 207, 208 for controlling the position of the contacts 188, 189 and 205, 206, respectively. As illustrated in FIG. 7, the cam 208 engages a cam follower surface 209 formed by a reverse bend in a spring finger 210 fixed at one end and having the movable contact 206 on the other end. When the lever 179 is in its normal position, the cam follower surface 209 engages the face of the cam 208 adjacent the upper edge thereof and the contacts 205, 206 are closed. If the lever 176 is moved to the left to close contacts 182, 183 the cam follower 209 rides off the face of the cam 208 and the contacts 205, 206 are opened. If, however, the lever 179 is moved to the right the face of cam 208 remains in engagement with the cam follower surface 209 and the contacts do not open. It can now be seen that the contacts 205, 206 will open when the contacts 182, 183 are closed providing a means for opening an associated circuit when the spindle is rotated to the left. The contacts 205, 206 may be connected into the motor plugging circuit for the spindle motor as described in the aforesaid patent or into any other circuit where it is desirable to open-contacts when the spindle is rotated in a particular direction. The contacts 188, 189 are operated in a manner similar to the contacts 205, 206 and are opened when the contacts 184, 185 are closed. These contacts may be connected in any circuit such as the motor plugging circuit where it is desirable to open a. circuit when the spindle is rotated to the right.

The rotor 176 and the lever 179 are yieldably urged to their normal position when moved therefrom by means best shown in FIG. 8 comprising a vertically supported compression spring 211 which is engaged at its upper end by one end of .a lever 212 which is pivotally supported at its other end, the lever 212 supporting a cam follower wheel 213 intermediate its ends. The lever 212 is moved about its pivot by a cam 214 keyed to the shaft 177 adjacent the inside surface of wall 178 and adapted to bear against the cam follower wheel 213 to move the lever 212 in a direction to compress spring 211 whenever the rotor 17 6 and the lever 17 9 are moved from their normal position. The cam 214 is provided with a notch 215.

The rotor 176 carries a ring 218 with a radially projecting portion 219 which is located intermediate the stops 216, 217 when the rotor is in its normal position and which engages the stop 216 to limit the rotative movement of the rotor in one direction and the stop 217 to limit the rotative movement of the rotor in the other direction.

The sloping sides 215', 215" of notch 215 cause the force applied by the spring 211 to the cam 214 through the Wheel 213 to urge the cam in a direction necessary to.

move the rotor back to its central or normal position where no rotataive force is applied to the cam by the spring whenever the rotor is moved therefrom within the limits allowed by stops 216, 217.

A face plate 220 is supported by the pendant control housing immediately in front of and parallel to the wall 178 of the housing through which the shaft 177 of rotor 176 extends. The face plate 220 is located outwardly of the rotor shaft 177 and is provided with an access opening 221 to permit the operator to move the lever 179. In order to provide a means for holding the lever 179 in to its. normal or central position.

assets immediately above the lever 179 when it is in its normal position. When the lever 179 is moved to either side of its normal position to cause the rotation of the spindle, the lever will move out from under the ear 222 and may be pivoted about the pivot pin 1S1 outwardly of the face plate so that it engages the side of the ear and is prevented from returning to its normal position. When the lever 179 is latched the spindle will continue rotating until the leveris released and returned by the spring 211 The lever for the spindle head feed and jog switch assembly 172 is shown, for purposes of illustration, in the latched position in FIG. 5. The sides of the ear may be sloped to aid in the latching operation, as illustrated in FIG. 5. The control unit described enables momentary movement or continuous movement of the spindle in either direction to be accomplished by the movement of a single lever, namely, lever 179 and the lever position will indicate direction of movement of the machine tool element permitting elimination of directional lights.

' To provide a switch assembly or unit which is extremely flexible and which is capable of being easily assembled and disassembled, the frame may be divided transversely into sections, as illustrated in FIG. 6, and assembled by a plurality of bolts 227 which are parallel to the rotor 176. In the illustrated embodiment the vertical transverse walls are each part of separate sections 228, 229 and 230 which include shoulders 231 extending outwardly from the transverse walls to properly space the walls.

The housing for pendant control station H is preferably L-shaped, as illustrated in FIG. 5, to provide narrow housing portions 233 for enclosing the various control units, thus providing side surfaces 234 which may be used by the operatoras gripping surfaces for his fingers when moving the manually operable control levers with his thumb to provide additional leverage and also prevent the control station H from swinging. Since the length of the controlstation will normally make it difficult to grip either the top or bottom of the housing for the control station when moving the manually operable control lever for the spindle head feed and jog control assembly or unit 172, the housing is provided with bosses 235, 236 immediately above and below the access opening for the actuating lever of the control assembly or unit. When moving the actuating lever, the operator may utilize these bosses to provide additional leverage. If desired, similar bosses can be provided for the other control units.

The control units for controlling the feed and jog movements of the spindle 17, spindle head C, saddle E and table F, as previously stated, are similar in construction to the. construction of the spindle rotation unit 169 described and will, therefore, not be described in detail. The control assembly 171, however, for controlling the rapid traverse of the spindle 17 has no means for locking its control lever in either its left or right position and must be held by the operator to rapid traverse continuously. While it has been stated that the control assemblies are the same in construction it will be understood that the number and type of electric contacts used with any particular controlunit may vary depending upon the number of operations to be performed by the movement of the manually operable control lever thereof. The control units will, however, generally have the normally open contacts which are closed when the rotor is moved in one direction but remain open when moved in another direction as describedinconnection with contacts 182, 183 and 184, 185 of control unit 169. It will also be well understood by those skilled in the art that while the illustrated embodiment utilizes the closing of normally open electrical contacts to complete electrical circuits for movto rotate either to the right or to the'left, the viewer facing the projecting end of the spindle, by moving the con ing the various elements and members of the machine it is possible to control these movements by the opening a of normally closed electrical contacts constructed, arranged, and operated inaccordance with the present invention.

In operating the machine the spindle 17 is first caused trol lever of unit 169 to the left or to the right. If the control lever is moved to the left, contacts 182, 183 are closed which completes a circuit from L1 of a three-phase power supply through wire 244, now closed contacts 182, 183 of switch 169, wire 245, operating solenoid of motor control contactor 246, and wire 247 to L2 of the power supply. The energization of the operating solenoid of motor control contactor 246 closes the normally open contacts 248, 249, 250, 251 and 252 thereof. The closing of contacts 248, 249, 250 connects the spindle drive motor 20 to L1, L2, L3 in such a manner that the motor rotates in the direction necessary to cause the spindle 17 to rotate to the left. Rotation of the spindle continues so long as the lever is maintained in the left position either manually or by being latched therein. If it is desired to rotate the spindle 17 to the right, the control lever 179 of unit 169 is moved to the right which closes normally open contacts 184, 185 and completes a circuit from L1 through wire 254, now closed contacts 184, 185, wire 255, operating solenoid of motor control contactor 256, and wire 257 to L2. The energization of operating solenoid of motor control contactor 256 causes the closing of its normally open contacts 258, 259, 260, 261 and 262. The closing of the contacts 258, 259, 260 connects the spindle drive motor 20 to L1, L2 and L3 so that the motor 20 rotates in the direction necessary to rotate the spindle to the right. The rotation of the spindle 17 to the right continues until the lever 179 is released or unlatched and allowed to return to its central position.

To feed the spindle 17 to the right, the manually operable control lever of the spindle feed control unit 170 is moved toward the right, closing its normally open contacts 264 and completing a circuit from L1 through wire 321 and contacts 252 of motor controller 246 or contacts 262 of motor controller 256 depending upon the direction of rotation of spindle since the spindle cannot be fed unless it is rotating, wire 322, wire 265 normally open con- 7 open contacts 269, 270 of the relay. The closing of contacts 269, 270 completes a circuit through either relay 271 or relay 272 depending upon the direction of rotation of the spindle. If the spindle 17 is rotating tothe left, contactor 246 is picked up and the closing of contacts 270 completes a circuit from L1 through wire 273, normally open contacts 251 now closed, wire 274, contacts 270, wire 275, relay 271 and wire 276 to L2. The energization of relay 271 closes the normally open contacts 279, 230, 281 of the relay 271. The closing of the contacts 279 completes a circuit from L1 through wire321,

normally open contact 252 of motor controller 246, which contacts are now closed, wire 322, wire 282, contacts 279 now closed, wire 283, solenoid 74 for'shifting the clutch element 71 controlling the spindle feed, and wire 284 to L2. The shifting of the clutch element 71 by the solenoid 74 now causes the spindle 17 to be fed to the right. In the event that the motor 20 is rotating to the right rather than to the left and the manually operable control lever of control unit 170 is moved to the right as assumed above, the closing of the contacts 270 will not complete a circuit since contactor 246 is not picked up but the closing of the contacts 269 of relay 267 will complete a circuit from L1 through wire 286, the now closed contacts 261 of contactor 256, wire 287, now closed contacts 269 of relay 267, wire 288, relay 272 and wire 289 to L2. Energization of the relay 272 closes its normally open contacts 291, 292 and 293. The closing of the contacts 291 completes a'circuit from L1 through wire 321, normally open contact 262 of motor controller 256 which contacts are now closed, wire 322, wire 294, now closed contacts 291-, wire 295, solenoid 75 for shifting the clutch element 71, and wire 296 to L2. It can now be seen that the relay 267 controls the energization of the solenoids 74, 75 for moving the clutch element 71 to assure that the spindle is always fed to the right regardless of the direction of rotation of the spindle drive motor 20. The spindle 17 will be fed to the right as long as the control lever is manually held or is latched in its right position.

If it is desired to feed the spindle 17 to the left, the manually operable control lever of spindle feed unit 170 is moved to the left, closing normally open contacts 298. The closing of the contacts 298 completes a circuit from L1 through wire 321, and normally open contacts 252 of motor controller 246-or normally open contacts 262 of motor controller 256, depending upon the direction of rotation of the spindle, wire 322, wire 265, now closed contacts 298, wire 300, relay 301, and wire 302 to L2. The energization of relay 301 closes its normally open contacts 303, 304. If the spindle drive motor 20 is rotating tothe left, the closing of contacts 303 does not completea circuit since contactor 256 is not picked up but the closing of 'contacts'304 completes a circuit from L1 through wire 273', now closed contacts 251 of motor contactor 246, Wire 274, now closed contacts 304, wire 288, relay 272, and wire 289 to L2. Energization of relay 272 closes the contacts 291 completing the circuit to sole noid 75 in the manner above described to shift the clutch element 71 for engaging the spindle feed. In the'event that the spindle 17 is rotating to the right, contactor 256 is picked up and the energization of relay 301 completes a circuit from L1 through wire 286, now closed contacts 261 of motor controller 256, wire 287, now closed contacts 303, wire 275, relay 271, and wire 276 to L2. The energization of relay 271 closes contacts 279 which completes a circuit to the solenoid 74 for shifting the clutch for controlling the spindle feed in the manner above described. It is now apparent that the relay 301 func tions in the same manner as relay 267 to assure that the spindle feed is to the'left when the manually operable lever of control unit 170 is moved to the left regardless of the direction of rotation of spindle motor 20. The spindle 17 will be fed to the left as long as the lever for the control unitis held manually or by latching on its left position to prevent its return to its central position.

The spindle 17 may be rapid traversed in the direction of the spindle feed by movement of the lever of spindle rapid traverse control unit 171 provided the spindle jog and feed controlunit is in a feed position so that the clutch element 71 is engaged. Movement of the lever of control unit 171 to the left closes its normally open contacts 306 which completes a circuit to either the contactor 307 or the contactor 308 for the reversible spindle rapid traverse motor 23. If the clutch 74 is energized and the relay 271 picked up,'a circuit to the contactor 307 is completed upon the closing of the contacts 306 of control unit 171 to rotate the rapid traverse motor 23 in the direction which will rapid traverse the spindle in the direction in which it is being fed. If, however, the relay 272 and the solenoid 75 are energized, a circuit is completed to contactor 308 for the spindle rapid traverse motor '23 upon the closing of the contacts 306 to rotate the motor in the opposite direction so that the direction of rapid traverse will be the same when the control lever is moved to the left regardless of which way the clutch element 71 is shifted. If the spindle is to be rapid traversed to the right, the leverof control unit 171 is moved tothe right, closing the normally open contacts 309. The closing of the contacts 309 completes a circuit to the motor controller307 through contacts 293 if the relay 272 and solenoid 75 are energized, or to the motor controller 308 if the relay 271 and the solenoid 74 are energized 14 to close the contacts 281 of the relay 271. It will be seen that the above described circuit causes the spindle 17 to be traversed in the direction indicated on the face 7 plate at the control lever as long as the control lever is held in a right or left position regardless of which solenoid of the clutch for controlling the spindle movement is energized. Preferably the spindle rapid traverse is interlocked with the spindle motor 20 so that the motor circuit is broken when the spindle rapid traverse control lever is moved so as to prevent feeding in one direction and rapid traversing in the other.

The feed and jog movements of the spindle head C, table F, and the saddle E are caused by energizing the feed motor 22 to rotate in the direction necessary to move the particular element in the desired direction and shifting the clutch for the particular element to an engaged position. The saddle E may be moved to the right by moving the lever of saddle jog and feed control unit 173 to the right which closes its normally open contacts 320. The closing of the normally open contacts 320 completes a circuit from L1 through wire 321, either the contacts 252 of motor controller 246 or the contacts 262 of the motor controller 256, depending upon the direction of rotation of the spindle, wire 322, now closed contacts 320 of switch 173, wire 323, relay 324, and wire 325 of L2. Energization of relay 324 closes its normally open contacts 326 and 327. The closing of the normally open contacts 326 completes a circuit from L1 through wire 328, now closed contacts 326, wire 329, operating solenoid of feed motor forward contactor 330 and wire 331 to L2. Energization' of the motor contactor 330 connects the feed motor 22 to L1, L2, L3 so that it rotates in the necessary direction to move the saddle to the right. The closing of the contacts 327 of relay 324 completes a circuit from L1 through wire 328, now closed contacts 327, wire 332, the solenoid 125 for engaging the clutch Q-for the saddle E, and wire 333 to L2. If the saddle E is to be moved to the left, the operating lever of control unit 173 is moved to the left, closing its normally open contacts 335 and completing a circuit from L1 through wire 321, either contacts 252 of controller 246 or contacts 262 of controller 256, depending upon which direction the spindle is rotating, wire 322, now closed contacts 335, wire 336, relay 337 and wire 325 to L2. Energization of the relay 337 closes its normally open contacts 338, 339

' to complete circuits from L1 through wire 340 to the feed motor reverse contactor 341 and the solenoid 125. The closing of the contacts 338 completes the circuit from wire 340 through the contacts 338, the wire 342, the con tactor 341 and the wire 331 to L2. The closing of the contacts 339 completes a circuit from the wire 340 through the contacts 339, the wire 332, the solenoid 125, and the wire 333 to L2. The saddle is moved continuously as long as the lever for the control unit 173 is manually held or latched in one of its rotated positions.

The electrical circuit for controlling the movement of the table F is similar to that for controlling the movement of the saddle E and the table F may be moved back, i.e. towards the rear of the machine by moving the lever of the table feed and jog control unit 174 toward the right as it is viewed in FIG. 5, which is toward the back of the machine. This closes the normally open contacts 345 of the table feed and jog control unit 174, completing a cir-- cuit through one set of closed contacts of the motor contactors 246, 256 for the spindle motor 20 and the relay 346. Energization of the relay 346 closes its normally open contacts 347, 348 which completes circuits from L1 to the motor contactor 341 for the feed motor 22 and the solenoid for controlling the engagement of the table clutch. .Moving the lever of table feed control unit in a forwarddirection, i.e., to the left when facing the lever, closes normally open contacts 349 which completes a circuit through closed contacts of either the contactor 246 or 256 for the motor 20 to energize the relay 350.

ai saooo 6 contacts 351, 352 to:complete a circuit from L1 to the motor contactor 330 for the feed motor 22 and to the solenoid. 135 .for'engaging the table clutch. The movement of the table F continues as long as the lever of control unit 174 is held or latched in one of its rotated positions.

The spindle head C may be moved in a, downward directionby moving the lever of control unit 172 to the right, which closes its normally open contacts 355. The closing of the normally open contacts 355 completes a circuit from L1 through closed contacts of either the motor 'contactor 246 or the contactor 256 for the spindle drive motor to energize the relay 356 in a manner similar to that described forthe energization of relay 324 for controlling the movement of the saddle. Energization of relay 356 closes its normally open contacts 357, 358 and completes circuits from L1 to the motor contactor 330 for the feed motor 22 and to the solenoid 162 for engaging the spindle head clutch. To move the spindle head C up, the operating lever of the spindle head control unit 1'72 is moved toward the left, closing its normally open contacts 360 to complete a circuit from L1 through closed contacts of either contactor 246 or contactor 256, to relay 361. Energization of relay 361 closes its normally open contacts 362, 363, completing circuits from L1 to the motor contactor 341 for the feed motor 22 and to the clutch solenoid 162 for engaging the spindle clutch. The movement of the spindle head continues as long as the operating lever of control unit 172 is manually held or latched in either its right or left position.

The spindle head C, table F or saddle E may be rapid traversed by depressing push button 175which completes a circuit to relay 366. Energization of the relay 366 closes its normally open contacts 367 which completes a circuit from L1 to the solenoid 106 of the rapid traverse clutch, causing the clutch to engage the rapid traverse as hereinbefore described.

The spindle head C, table F, and saddle E may be interlocked so only one element may be moved at a time. This may be done by using switches which are actuated by the movement of the clutch element for the particular machine tool element, as described in detail in the aforementioned patent. It may also be done electrically by the use of relays or by the use of interlocking contacts mounted alongside the rotors of the various control units described.

Suitable limit and overtravel switches may be provided to automatically stop the movement of the spindle head C, the saddle E, and table F. The location and operation of these switches are well known to one skilled in the art and for purposes of simplification and clarity are not shown or described herein.

' From the foregoing it will be apparent that the objects of the invention heretofore enumerated and others have been accomplished and that I have provided a novel and improved machine tool or the likehaving one or a plurality of power actuated members intended to be operated under the direct visual control of the operator and which comprises a small compact control station having a plurality of manually operable controls for executing a plua power actuated member intended to be operated under the direct visual supervision and control of an operator.

While the preferred embodiment of the invention has been described with considerable detail, the invention is not limited to the particular construction shown and it is my intention to cover hereby all adaptations, modifical6 tions anduses thereof which come within the practice of those skilled in the art to which the invention relates and the scope of the appended claims.

Having thus described the invention, I claim: 1. In a machine tool having a movable member and power mechanism for moving said member, control ap-' paratusfor eftecting selective operation of said power mechanism to produce movement of said member under the visual supervision of an operator comprrsmg:

electric switch means having operative and inoperative positions adapted to be operatively coupled to said power mechanism to effect actuation of said power mechanism to move said member only when in said operative position;

a support structure;

a manually movable member;

, means operatively connecting said manually movable member to said support structure for movement in a plane between first and second positions; a

means operatively connected to said manually movable member yieldably urging said manually movable member to said first position; 1

' means operatively connecting said manuallymovable member and said switch means for positioning said switch means in said operative position when said manually movable member is in said second. position and in said inoperative position when said manually movable member is in said first position;

means operatively connecting said manually'movable member to said first named means for oscillatory V movement about an axis parallel with said plane;

' and an abutment on said support structure with which said manually movable member is engageable when in said second position upon movement of said manually movable member about said axis in one direction whereby said manually movable member may be selectively latched in said second position.

' 2. In a machine tool having a movable member and power means operative in different directions for moving said member in two directions, control apparatus for effecting selective operation of said power means to produce movement of said member in said two directions under the visual supervision of an operator comprising: a support structure; a movable control member;

first means operatively connecting said control member' to said support structure for movement in a plane between inoperative and two operative positions, said inoperative position being intermediate the respective operative positions; second means operatively connected to said control member yieldably urging said control member to said inoperative position; third means adapted to be operatively coupled to said power means for effecting operation of said power means in different directions;

means operatively connecting said control member with said third means to effect operation of said power means and in turn movement of said movable member in difierent directions when said control member is in different of said operative positions;

, fourth means operatively connecting said control member to said first named means for oscillatory movement about an axis parallel with saidplane;

and abutment means on said support structure with which said control member is engageable when in either of said operative positions upon movement of said control member aboutsaid axis whereby said second member may be selectively latched in a selective one of said operative positions.

3., In a horizontal boring machine of the character described having a plurality of slide members each movable in opposite directions and power mechanism for moving said members, control apparatus for effecting operation of said power mechanism to produce movement of said slide members in opposite directions underthe visual supervision of an operator comprising:

a plurality of control instrumentalities each having forward and reverse operating positions and an intermediate inoperative position, adapted to be operatively connected or coupled to said power mechanism to efi'ect actuation of said power mechanism to move said slide members respectively in opposite directions only when in said operative positions;

a support structure;

a plurality of manually movable members;

means operatively connecting each of said manually movable members to said support structure for movement in respective planes between first, second and third positions, the respective said first positions being intermediate the respective said second and third positions,

means operatively connected to said manually movable member yieldably urging each of said manually movable members to their respective said first positions;

means operatively connecting said manually movable members and said control instrumentalities respectively for positioning said control instrumentalities in said inoperative positions when said manually movable members are in said first positions and in selective operative positions when said manually movable members are in their respective said second and third positions;

means operatively connecting each of said manually movable members to said first manned means respectively for oscillatory movement about an axis parallel with its respective said plane;

and means on said support structure selectively engageable by said manually movable members when in their respective said second and third positions upon movement thereof about their respective said axis in one direction whereby said members may be selectively latched in their respective said second and third positions.

4. In a horizontal boring machine of the character described having a plurality of slide members each movable in opposite directions and power mechanism for moving said members, control apparatus for efiecting operation of said power mechanism to produce movement of said members in opposite directions under the visual supervision of an operator comprising: e

a plurality of electric switch means each having forward and reverse operating positions and an intermediate inoperative position, adapted to be operatively connected or coupled to said power mechanism to effect actuation of said power mechanism to move said slide members respectively in opposite directions only when in said operative positions;

a pendant control station including a support structure;

a plurality of manually movable members;

means operatively connecting each of said manually movable members to said support structure for movement in respective planes between first and second and third positions, the respective said first positions being intermediate the respective said second and third positions;

means operatively connected to said manually movable members yieldably urging each of said manually movable members to said first positions;

means operatively connecting said manually movable members and said electric switch means respectively for positioning said electric switch means in said inoperative positions when said manually movable members are in said first positions and in selective operative positions when said manually movable members are in said second and third positions;

means operatively connecting each of said manually movable members to said first named means respectively for oscillatory movement about an axis parallel with its respective said plane;

and abutment means on said support structure selectively engageable by said manually movable members when in their respective said second and third positions upon movement thereof about their respective said axis in one direction whereby said manually movable members may be selectively latched in their respective said second and third positions.

5, In a device for controlling the operation of a member movable by power means under the visual supervision of an operator:

a supporting structure;

a manually movable member;

means operatively connecting said manually movable member to said supporting structure for movement in a plane between first and second positions;

means operatively connected to said manually movable member yieldably urging said manually movable member to said first position; I

a control instrumentality having operative and inoperative positions and adapted to be coupled to said power means;

means operatively connecting said control instrumentality to said manually movable member such that said control instrumentality is in operative position when said manually movable member is in said first position and in operative position when said manually movable member is in said second position;

means operatively connecting said manually movable member to said first named means for oscillatory movement about an axis parallel with said plane;

and abutment means on said support structure selectively engageable by said manually movable member when in said second position upon movement of said manually movable member about said axis in one direction whereby said manually movable member may be selectively latched in said second position.

6. In a device for controlling the operation of a member movable by power means under the visual supervision of an operator:

a supporting structure;

a manually movable member;

means operatively connecting said manually movable member to said supporting structure for movement in a plane between first and second positions;

means operatively connected to said manually movable member yieldably urging said manually movable member to said first position;

electric switch means having operative and inoperative positions and positioned to be coupled to said power 7 means;

means operatively connecting said switch means to said manually movable member such that said switch means is in inoperative position when said manually movable member is in said first position and in operative position when said manually movable member is in said second position;

means operatively connecting said manually movable member to said first named means for oscillatory movement about an axis parallel with said plane;

and abutment means on said support structure selectively engageable by said manually movable member when in said second position upon movement of said manually movable member about said axis in one direction whereby said manually movable member may be selectively latched in said second position.

7. In a device for controlling the operation of a member movable by power means in two directions under the visual supervision of an operator:

a support structure;

a manually movable member;

means operatively connecting said manually movable member to said supporting structure-for movement in a plane between first, second and third positions, said first position being intermediate said second and third positions;

' meansoperatively connected to said manually movable member yieldably urging said manually movable member to said first position;

control means having operative and inoperative positions and adapted to be coupled to said power means;

means operatively connecting .said control means to said manually movable member'and in inoperative position when said manually movable member is in said first position such that said control means is in selective operative positions when said manually movable member is in said second and third positions; means operatively connecting said manually movable member to said first named means for oscillatory movement about an axis parallel with said plane; and abutment means on said support structure selectively engageable by said manually'movable member when in said second and third positions upon movement thereof about their respective said axes in one direction whereby said manually movable member may be'selectively latched in said second and third positions.

8. In a control station for controlling the operation of a plurality of members movable by power means under the visual supervision of an operator:

a supporting member; a

a plurality of manually movable members;

means operatively connecting each of said manually movable members to said supporting structure for movement in respective planes between first and second positions; means operatively connected to said manually movable member yieldably urging each of said manually movable members to said first position; I

a plurality of control instrumentalities having operative and inoperative positions and adapted to be coupled to said power means;

: means operatively connecting one of said control instrumentalities to each of said manually movable members for movement between inoperative and operative positions such that said control instrumentality is in inoperative position when said manually movable member with which it is operatively connected is in said first position and in operative position when said manually movable member is in said second position;

means operatively connecting each of said manually movable members to said first named means for oscillatory movement about an axis parallel with its respective said plane; I v and abutment means on said support structure selectively engageable by said manually movable members when in their said second positions upon movement thereof about their respective said axes in one direction whereby said manually movable members may be-selectively latched in their said second positions.

9. In a control station for controlling the operation of a plurality of members each movable by power means in two directions under the visual supervision of an operator:

' a supporting structure;

a plurality of manually movable members;

means operatively connecting each of said manually movable members to said supporting structure for movement in respective planes between first, second and third positions, said first positions being intermediate said second and third positions;

I means operatively connected to said manually movable members yieldably urging each of said manually movable members to said first positions;

control means having operative and inoperative positions and adapted to be coupled to said power means;

means operatively connecting one of said control means to each of said manually movable members and in inoperative positions when said manually movable members are in said first positions such that the said 2% control means is in selective operative positions when said manually movable members are in said second and third positions; means operatively connecting each of said manually movable members to said first named means for oscillatory movement about an axis parallel with its re- 7 I respective said plane;

and abutment means on. said supporting structure semovement in respective planes between first and sec- 0nd positions; 7 r means operatively connected to said manually movable members yieldably urging each of said manually movable members to said first position; electric switch means having operative and inoperative positions and adapted to be coupled to said power means; 7 means operatively connecting one of said switch means with each of said manually movable members and in inoperative positions when said manually movable members are in said first positions such that the said switch means is in operative positions when said manually movable members are in said second positions;

means operatively connecting each of said manually movable members to said first named means for oscillatory movement about an axis parallel with its respective said plane;

and abutment means on said support structure with which said manually movable members are engageable when in their said second positions upon movement of said manually movable members about their respective said axes in one direction whereby said manually movable members may be selectively latched in their said second positions.

11. In a pendant control station for controlling the operation of a plurality of members each movable by power means in two directions under the visual supervision of an operator:

a supporting structure; a plurality of manually movable members; means operatively connecting each of said manually movable members to said supporting structure for I movement in respective planes between first, second and third positions, said first positions being intermediate said second and third positions; means operatively connected to said manually movable members yieldably urging each of said manually movable members to their respective said first positions;

electric switch means having operative and inoperative positions and adapted to be coupled to said power means;

means operatively connecting one of said switch means operatively connected to each of said movable mem-- bers suchthat said switch means are in inoperative positions when said manually movable members are in said first positions and in selective operative positions when said manually movable members are in their respective said second and third positions; means operatively connecting each of said manually movable members tosaid first named means for oscillatory movement about an axis parallel with its respective said plane;

and abutment means on said support structure with which said manually movable members are engageable when in their respective said second and third positions upon movement of said manually movable members about their respective axes in one direction whereby said members may be selectively latched in their respective said second and third positions.

12. In apparatus comprising a member movable by power means under the visual supervision of an operator:

a supporting structure;

a manually movable member; V

means operatively connecting said manually movable member to said supporting structure for movement in a plane between first and second positions;

means operatively connected to said manually movable member yieldably urging said manually movable member to said first position;

a control instrumentality having operative and inoperative positions and adapted to be coupled to said power means;

means operatively connecting said control instrumentality to said manually movable member such that said control instrumentality is operative to efiect movement of the power actuated member when said manually movable member is in said second position and inoperative to eifect such movement when said manually movable member is in first position;

means operatively connecting sm'd manually movable member to said first named means for oscillatory movement about an axis parallel with said plane;

and abutment means on said support structure with which said manually movable member is engageable when in said second position upon movement of said manually movable member about said axis in one direction whereby said manually movable member may be selectively latched in said second position.

13. In an apparatus comprising a member movable by power means in two directions under the visual supervision of an operator:

a supporting structure;

a manually movable member;

means operatively connecting said manually movable member to said supporting structure for movement in a plane between first, second and third positions, said first position being intermediate said second and third positions;

means operatively connected to said manually movable member yieldably urging said manually movable member to said first position;

control means having an inoperative and two operative positions and adapted to be coupled to said power means;

means operatively connecting said control means to said manually movable member such that said control means is in inoperative position when said manually movable member is in said first position and in selective operative positions when said manually movable member is in said second and third positions;

means operatively connecting said manually movable member to said first named means for oscillatory movement about an axis parallel with said plane;

and abutment means on said supporting structure with which said manually movable member is engageable when in said second and third positions upon movement of said manually movable member about said axis in one direction whereby said manually movable member may be selectively latched in said second and third positions.

14. In a control device supporting structure a manually movable member;

means operatively connecting said manually movable member to said supporting structure for movement in a plane between first and second positions;

means operatively connected to said manually movable member yieldably urging said manually movable member to said first position;

means operatively connectingsaid manually movable member to said first named means for oscillatory movement about an axis parallel with said plane;

and abutment means on said supporting structure with which said manually movable member is engageable when in said second position upon movement of said manually movable member about said axis in one direction whereby said manually movable member may be latched in said second position.

15. In a control device supporting structure a manually movable member;

means operatively connecting said manually movable member to said supporting structure for movement in a plane between first and second positions;

means operatively connected to said manually movable member yieldably urging said manually movable member to said first position;

a control instrumentality having operative and inoperative positions operatively connected to said manually movable member and in inoperative position when said manually movable member is in said first position and in operative position when said manually movable member is in said second position;

means operatively connecting said manually movable member to said first named means for oscillatory movement about an axis parallel with said plane;

and abutment means on said supporting structure with which said manually movable member'is engageable when in said second position upon movement of said manually movable member about said axis in one direction whereby said manually movable member may be latched in said second position.

16. In a device of the character described:

a first support;

a member movable by power means under the visual supervision of an operator;

means operatively connecting said member to said first support;

a manually movable member;

a second support;

means operatively connecting said manually movable member to said second support for movement in a plane between an inoperative position and an operative position;

means operatively connected to said manually movable member yieldably urging said manually movable member to said inoperative position;

control means adapted to be coupled in said power means;

means operatively connecting said control means to said manually movable member for eifecting movement of said power actuated member when said manually movable member is in said operative position;

means operatively connecting said manually movable member to said second named means for oscillatory movement about an axis parallel with said plane;

and abutment means on said second support selectively engageable by said manually movable member when in said second position whereby said manually movable member may be latched in said second position upon manual oscillation thereof about said axis.

17. In a control station for controlling the operation of a member movable by power means under the visual supervision of an operator:

a support;

a manually movable member;

means operatively connecting said manually movable 23 member to said support for movement in a plane between first and second positions;

.means operatively connected to said manually movable member yieldably urging said manually movable member to said first position;

a control instrumentality having operative and inoperative positions and adapted to be coupled to said power means;

means operatively connecting said control instrumentality to said manually movable member for movement between inoperative and operative positions such that said control instrumentality is in inoperative position when said manually movable member is in said first position and in operative position when said manually movable member is in said second position;

means operatively connecting said manually movable member to said first named means for oscillatory movement about an axis parallel with said plane;

and abutment means on said support selectively engageable by saidmanually movable member when in said second position whereby said manually movable member may be latched in said second position upon manual oscillation thereof about said axis.

18, In a control station for controlling the operation of a member movable by power means in two directions under the visual supervision of an operator:

a support;

a manually movable member; 7

means operatively connecting said manually movable member to said support for movement in a plane between first, second and third positions, said first position being intermediate saidsecond and third positions; I 7 means operatively connected to said manually movable member yieldably urging said manually movable I member to said first position; I

control instrumentalities having operative and inoperative positions and adapted to be coupled to said power means;

means operatively connecting said control instrumentalities to said manually movable member for movement between inoperative and operative positions such that said control instrumentalities are in inoperative positions when said manually movable member is in said first position and inoperative positions when said manually movable member is in said second and third positions; 7

means operatively connecting said manually movable member to said first named means for oscillatory movement about an axis parallel with its respective said plane; 7

and abutment means on said support selectively engageable by said manually movable member when insaid second and third positions whereby said manually movable member may be latched in said second and third positions upon manual oscillation thereof about said axis.

References Cited in the file of this patent UNITED STATES PATENTS Stephan Aug. 7, 1956 

4. IN A HORIZONTAL BORING MACHINE OF THE CHARACTER DESCRIBED HAVING A PLURALITY OF SLIDE MEMBERS EACH MOVABLE IN OPPOSITE DIRECTIONS AND POWER MECHANISM FOR MOVING SAID MEMBERS, CONTROL APPARATUS FOR EFFECTING OPERATION OF SAID POWER MECHANISM TO PRODUCE MOVEMENT OF SAID MEMBERS IN OPPOSITE DIRECTIONS UNDER THE VISUAL SUPERVISION OF AN OPERATOR COMPRISING: A PLURALITY OF ELECTRIC SWITCH MEANS EACH HAVING FORWARD AND REVERSE OPERATING POSITIONS AND AN INTERMEDIATE INOPERATIVE POSITION, ADAPTED TO BE OPERATIVELY CONNECTED OR COUPLED TO SAID POWER MECHANISM TO EFFECT ACTUATION OF SAID POWER MECHANISM TO MOVE SAID SLIDE MEMBERS RESPECTIVELY IN OPPOSITE DIRECTIONS ONLY WHEN IN SAID OPERATIVE POSITIONS; A PENDANT CONTROL STATION INCLUDING A SUPPORT STRUCTURE; A PLURALITY OF MANUALLY MOVABLE MEMBERS; MEANS OPERATIVELY CONNECTING EACH OF SAID MANUALLY MOVABLE MEMBERS TO SAID SUPPORT STRUCTURE FOR MOVEMENT IN RESPECTIVE PLANES BETWEEN FIRST AND SECOND AND THIRD POSITIONS, THE RESPECTIVE SAID FIRST POSITIONS BEING INTERMEDIATE THE RESPECTIVE SAID SECOND AND THIRD POSITIONS; MEANS OPERATIVELY CONNECTED TO SAID MANUALLY MOVABLE MEMBERS YIELDABLY URGING EACH OF SAID MANUALLY MOVABLE MEMBERS TO SAID FIRST POSITIONS; MEANS OPERATIVELY CONNECTING SAID MANUALLY MOVABLE MEMBERS AND SAID ELECTRIC SWITCH MEANS RESPECTIVELY FOR POSITIONING SAID ELECTRIC SWITCH MEANS IN SAID INOPERATIVE POSITIONS WHEN SAID MANUALLY MOVABLE MEMBERS ARE IN SAID FIRST POSITIONS AND IN SELECTIVE OPERATIVE POSITIONS WHEN SAID MANUALLY MOVABLE MEMBERS ARE IN SAID SECOND AND THIRD POSITIONS; MEANS OPERATIVELY CONNECTING EACH OF SAID MANUALLY MOVABLE MEMBERS TO SAID FIRST NAMED MEANS RESPECTIVELY FOR OSCILLATORY MOVEMENT ABOUT AN AXIS PARALLEL WITH ITS RESPECTIVE SAID PLANE; AND ABUTMENT MEANS ON SAID SUPPORT STRUCTURE SELECTIVELY ENGAGEABLE BY SAID MANUALLY MOVABLE MEMBERS WHEN IN THEIR RESPECTIVE SAID SECOND AND THIRD POSITIONS UPON MOVEMENT THEREOF ABOUT THEIR RESPECTIVE SAID AXIS IN ONE DIRECTION WHEREBY SAID MANUALLY MOVABLE MEMBERS MAY BE SELECTIVELY LATCHED IN THEIR RESPECTIVE SAID SECOND AND THIRD POSITIONS.
 14. IN A CONTROL DEVICE SUPPORTING STRUCTURE A MANUALLY MOVABLE MEMBER; MEANS OPERATIVELY CONNECTING SAID MANUALLY MOVABLE MEMBER TO SAID SUPPORTING STRUCTURE FOR MOVEMENT IN A PLANE BETWEEN FIRST AND SECOND POSITIONS; MEANS OPERATIVELY CONNECTED TO SAID MANUALLY MOVABLE MEMBER YIELDABLY URGING SAID MANUALLY MOVABLE MEMBER TO SAID FIRST POSITION; MEANS OPERATIVELY CONNECTING SAID MANUALLY MOVABLE MEMBER TO SAID FIRST NAMED MEANS FOR OSCILLATORY MOVEMENT ABOUT AN AXIS PARALLEL WITH SAID PLANE; AND ABUTMENT MEANS ON SAID SUPPORTING STRUCTURE WITH WHICH SAID MANUALLY MOVABLE MEMBER IS ENGAGEABLE WHEN IN SAID SECOND POSITION UPON MOVEMENT OF SAID MANUALLY MOVABLE MEMBER ABOUT SAID AXIS IN ONE DIRECTION WHEREBY SAID MANUALLY MOVABLE MEMBER MAY BE LATCHED IN SAID SECOND POSITION. 